Description

WHAT IS CTH HYGIENIC CENTRIFUGAL PUMP FOR?

The CTH hygienic centrifugal pumps are suitable for a wide variety of applications within the food, beverage and pharmaceutical industries at competitive pricing and quick lead times. The CTH Hygienic End Suction, Close Coupled, Single Stage Centrifugal Pumps feature either an Open (6 mm Solids Passage) or Semi-Open Impeller and are manufactured from Stainless steel AISI 316L, electro polished to Ra <0.8, to offer high mechanical and corrosion resistance for a plethora of hygienic applications at competitive pricing.

Design Features & Benefits

The pump has been innovatively designed with only 19 components which enable them to be maintained and troubleshot in a limited time frame. This results in very short downtimes and extremely low maintenance cost. In fact, in many cases once installed these pumps are maintenance free! The modular design enables the pumps to be supplied with a variety of different build options making it an incredibly robust and versatile pump suitable for a wide range of both applications and installations.

Furthermore, with casing and impeller in <0.8 Ra electro polished stainless steel AISI 316L, and possibilities for draining & also fitted with hygienic shroud & jacketing options means it meets the demands of clean ability and quality of high finish commanded within food, beverage and pharmaceutical industries.

Typical Applications

The CTH Hygienic Centrifugal Pump Range is suitable for a wide variety of applications within the food, beverage and pharmaceutical industries. As they can be ATEX rated they can also be used for hazardous zones.

They are ideally suited for the transfer of various ingredients and products like edible oil, flavourings, alcohol, dairy products, and juice. With heating jackets, there are further possibilities like pumping margarine, paraffin and even chocolate. There are also many auxiliary applications such as the transfer of CIP liquids, detergents and water.

Rather than typically being used for tank to tank transfer applications, they can also, however, be used for pressure boosting, dispensing, loading and offloading, tank cleaning, batching & metering, when used in conjunction with some of our wide range of control accessories.

Materials Data & Limits

Casing

Stainless steel AISI 316L electro polished Ra <0.8

Impeller

Mechanical Seal

Single ceramic/graphite (standard), SiC/SiC or SiC/graphite, Optional with Lubrication or Flushing

O-Rings

EPDM FDA approved (standard), or FEP/silicone FDA approved

Motor

IP55; IEC frame B34; Available with ATEX cat 2 or 3; Eex e or Eex d

Pressure Rating

10 bar (PN10)

Temperature

Max 90°C; 180°C for long coupled pump

Viscosity

Max ~200 cSt

Particles

Max diameter is 6 mm (std open impeller); bigger if soft particles

Capacity Range

The CTH Hygienic Centrifugal Pump units are available with either 2 pole (high head applications) or 4 pole (low head applications) motors to provide a wide envelope of capacity, detailed as follows:

2 Pole Motor (2900 rpm)

Model

Max Flow
m³/hr

Max Head
m

CTH AA-03

7

10

CTH AA-05

12

10

CTH BB-07

17

11

CTH CC-15

19

22

CTH CC-22

34

22

CTH CE-22

20

31

CTH DD-40

50

22

CTH DF-40

28

35

CTH DF-60

42

35

CTH DG-60

30

47

CTH EF-55

42

35

CTH EG-55

30

47

CTH EF-75

60

35

CTH EG-75

35

47

4 Pole Motor (1450 rpm)

Model

Max Flow
m³/hr

Max Head
m

CTH AA-024

7

2.7

CTH BB-054

9

2.8

CTH CC-114

18

5.5

CTH CE-114

22

7.7

CTH DD-224

25

5.5

CTH DF-224

34

8.7

CTH DG-224

42

12.0

2 Pole Motors Tombstone

4 Pole Motors Tombstone

General Dimensional Information

NOTE: Build specific GA Drawings in 2D as well as DWG and STEP Files are available on request for easy integration into system installations and OEM products. Dimensions are in mm and based on standard build constructions. (*) Dimensions may vary according to motor brands.

Close Coupled Design, Standard

Model

Power
kW

Frame
Size

Weight

A

B*

C

D

E

F

G*

L*

N

CTH AA-03

0.37

71

7.35

60

358

36

100

71

193

90

112

145

CTH AA-05

0.55

71

8.00

60

358

36

100

71

193

90

112

145

CTH BB-07

0.75

80

11.40

63

395

50

110

80

205

100

125

170

CTH CC-15

1.5

90

22.25

64

429

68

160

90

226

125

140

205

CTH CC-22

2.2

90

24.10

64

429

68

160

90

226

125

140

205

CTH CE-22

2.2

90

24.15

64

429

68

160

90

226

125

140

205

CTH DD-40

4.0

112

37.05

70

479

92

192

100

251

140

160

256

CTH DF-40

4.0

112

37.10

70

479

92

192

100

251

140

160

256

CTH EF-55

5.5

132

53.30

70

571

92

192

132

293

140

216

256

CTH EG-55

5.5

132

53.40

70

571

92

192

132

293

140

216

256

CTH EF-75

7.5

132

64.80

70

571

92

192

132

293

140

216

256

CTH EG-75

7.5

132

65.15

70

571

92

192

132

293

140

216

256

CTH AA-024

0.25

71

7.25

60

358

36

100

71

197

90

112

145

CTH BB-054

0.55

80

15.80

63

395

50

110

80

205

100

125

170

CTH CC-114

1.1

90

15.85

64

451

68

160

90

226

125

140

205

CTH CE-114

1.1

90

15.90

64

451

68

160

90

226

125

140

205

CTH DD-224

2.2

100

32.20

70

478

92

192

100

250

140

160

256

CTH DF-224

2.2

100

32.30

70

478

92

192

100

250

140

160

256

CTH DG-224

2.2

100

32.40

70

478

92

192

100

250

140

160

256

Connections Dimensions

Model

DIN 11851 (Std.)
Thread

DIN 32676
Clamp

ISO 2852
Clamp

SMS 1145
Thread

RJT
Thread

Ra

Ri

Ra

Ri

Ra

Ri

Ra

Ri

Ra

Ri

CTH A

DN 25

DN 25

DN 25

DN 20

38

25

38

25

1½”

1”

CTH B

DN 40

DN 32

DN 40

DN 25

38

25

51

38

1½”

1½”

CTH C

DN 40

DN 40

DN 40

DN 40

38

38

51

38

2”

2”

CTH D

DN 65

DN 50

DN 65

DN 50

70

51

63

51

3”

2”

CTH E

DN 65

DN 50

DN 65

DN 50

70

51

63

51

3”

2”

Connection Options

DIN 11851 thread (standard)

DIN 32676 clamp

ISO 2852 clamp

SMS thread

RJT thread

Sealing Options

Standard Single Mechanical Seals are provided with a range of face materials, Ceramic / Graphite / SiC and O-Rings are available in EPDM / FKM / FFKM or FEP or alternatively the seal can be provided with an OP-Ring (Square O-Ring). This increases the friction between the O-Ring and the back casing and therefore lowering the chances of the static parts of the seal from sticking together.

Flushed Mechanical Seals (API Plan 11)

It can be provided upon request and are particularly suited when abrasive or sticky particles are being pumped. This system recirculates a small amount of the pumped product from the discharge connection of the pump to the seal chamber to make sure the seal faces and chamber are kept lubricated and clean from the abrasive or sticky particulates. In addition, a self-cleaning filter is fitted to the discharge to collect any large particulates before they are flushed back to the seal and seal chamber. The Flushed Seal pipework and filter are fixed with gas fittings for easy disassembly during routine inspections and maintenance.

Lubricated & Externally Quenched Mechanical Seals

It can also be provided upon request and are ideally used when there is the potential for dry running or where there is a chance for the product to solidify or crystalize. An Oil Pot is connected to the seal chamber and continually lubricates seal during operation. SAE grade 20 Oil is recommended however you must use a fluid compatible with the pumped medium and materials within the pump. As an alternative, the CTHs can be supplied with ports to facilitate an external quench system. This provides the added benefit of removing heat build-up from the seal face and doesn’t require changing of the lubricating fluid. The max pressure of the quench circuit is 0.5 bar and it is recommended to install a thermo-syphon circulation into the quench circuit.

Heating Jackets

Additional Parts Required

1 x Pump Back Cover for Heating Jacket (111)

1 x Pump Back Casing with Heating Jacket (120)

2 x Joint for Pump with Heating Jacket (125)

The jacket is welded into the pump back casing and a heating or cooling medium is continuously circulated in the jacket.Heating Jackets can be fitted in order to provide greater protection for the mechanical seal in cases where there is a risk of solidification of the product being pumped. They can also be used when the temperature of the pumped product has to be maintained to a specific temperature, high or low.

The jacket has two ISO G ½” connections, other options are available upon request, such as flanged. Connection to the jacket is done by using flexible hoses to prevent any undue stress and strain on the heating jacket connectors.

The medium used need to be fully compatible with materials of the pump.

The maximum temperature for the heating medium is 60°C at a maximum pressure of 2 bar.

Electro-Polished, Stainless Steel AISI 316L

Additional Parts Required

1 x Hygienic Pump Shroud (31)

4 x Shroud Feet (34)

4 x Shroud Feet Screws (341)

4 x Shroud feet Screw Washers

Electro-Polished, Stainless Steel AISI 316L, Hygienic Shrouds can easily be fitted to provide added protection for the motor during wash-downs and also providing an easier cleaning surface with increased resistance to bacterial build up.

Permitted Loads on Inlet & Outlet Connections

We recommend not exceeding the following loads & forces to ensure safe operation of the pump.